
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

extern char** environ;

int main(int argc,char* argv[],char* env[])
{
    (void)argc;
    (void)argv;

    putenv((char*)"ZMH=12312341");

    putenv((char*)"ZMH=xxx12312341");
    char* ch = getenv("ZMH");
    printf("%s\n",ch);
    return 0;
}
